<p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif, 'Microsoft YaHei', tahoma; font-size: 14px; line-height: 24px; background-color: rgb(241, 254, 221);"> int main()</p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif, 'Microsoft YaHei', tahoma; font-size: 14px; line-height: 24px; background-color: rgb(241, 254, 221);">{</p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif, 'Microsoft YaHei', tahoma; font-size: 14px; line-height: 24px; background-color: rgb(241, 254, 221);"> </p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif, 'Microsoft YaHei', tahoma; font-size: 14px; line-height: 24px; background-color: rgb(241, 254, 221);"> cout<<"input the filename:"<<endl;</p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif, 'Microsoft YaHei', tahoma; font-size: 14px; line-height: 24px; background-color: rgb(241, 254, 221);"> string filename;</p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif, 'Microsoft YaHei', tahoma; font-size: 14px; line-height: 24px; background-color: rgb(241, 254, 221);"> cin>>filename;</p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif, 'Microsoft YaHei', tahoma; font-size: 14px; line-height: 24px; background-color: rgb(241, 254, 221);"> ifstream infile(filename.c_str());</p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif, 'Microsoft YaHei', tahoma; font-size: 14px; line-height: 24px; background-color: rgb(241, 254, 221);"> string temp;</p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif, 'Microsoft YaHei', tahoma; font-size: 14px; line-height: 24px; background-color: rgb(241, 254, 221);"> while(getline(infile,temp))</p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif, 'Microsoft YaHei', tahoma; font-size: 14px; line-height: 24px; background-color: rgb(241, 254, 221);"> {</p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif, 'Microsoft YaHei', tahoma; font-size: 14px; line-height: 24px; background-color: rgb(241, 254, 221);"> cout<<temp<<endl;</p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif, 'Microsoft YaHei', tahoma; font-size: 14px; line-height: 24px; background-color: rgb(241, 254, 221);"> }</p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif, 'Microsoft YaHei', tahoma; font-size: 14px; line-height: 24px; background-color: rgb(241, 254, 221);"> cout << "Hello world!" << endl;</p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif, 'Microsoft YaHei', tahoma; font-size: 14px; line-height: 24px; background-color: rgb(241, 254, 221);"> return 0;</p><p style="margin-top: 0px; margin-bottom: 0px; padding-top: 0px; padding-bottom: 0px; color: rgb(51, 51, 51); font-family: arial, 宋体, sans-serif, 'Microsoft YaHei', tahoma; font-size: 14px; line-height: 24px; background-color: rgb(241, 254, 221);">}</p>